Furnace-arch construction



Feb. 15, 1927.

A. O. JACKSON FURNACE ARCH CONSTRUCTION Original Filed Oct. 3, 1924 2 Sheets-Sheet l EJFH JFIQFIEIQEJ IL... UNI-3.

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A. O. JACKSON FURNACE ARCH CONSTRUCTION 2 Sheets-Sheet 2 Original Filed Oct. 5, 1924 glwvemfoz A. 0. Jackson Patented Feb. 15, 1927.

UNITED STATES ANDREW' O. JACKSON, OF PORTLAND, OREGON.

FURNACE-ARCH CONSTRUCTION.

Application filed October 3, 1924, Serial No. 741,416.

entirely from above. Another object of the invention is to provide a furnace arch of such construction that only a very small portion of the lower ends of the bricks will be in contact and the bricks will be so formed as to provide openings or spaces between adj acent brick to receive an asbestos or other heat-resistant cement to prevent the heat passing between the bricks. Another object of the invent-ion is to provide a structure in which any one brick may be removed when repairs are needed without disturbing any other bricks. All these objects and other objects which will hereinafter incidentally appear are attained in such a structure as is illustrated in the accompanying drawings, and the invention resides in certain novel features which will be particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a plan View of a portion of an arch embodying my invention;

Fig. 2 is a central longitudinal section of the structure shown in Fig. 1;

Fig. 3 is a sectional elevation of a portion of a flat arch;

Fig 4: is a view in section through one of the bricks shown in Fig. 2, in a plane parallel with the supporting beam;

Fig. 5 is a section on the line 55 of Fig.

4, and

Fig. 6 is an enlarged section on the line 66 of Fig. 3.

In carrying out my invention, I employ a plurality of beams 1 which may be of channel or I formation and which may be provided in such number as may be requisite for an arch of the desired dimensions. The beams are, of course, arranged in parallelism transversely of the contemplated arch, and extending through the webs of the several beams are rods 2 which are disposed at right angles to the beams and will also be provided in a number determined by the size of the contemplated arch. At a proper point of the arch, a flue 3 is supported by the rods 2 between the beams 1 and may be connected with the beams or rods in any convenient manner. Suspended 011 the several rods or bars 2 are clevises or stirrups 4 which preferably have their side Renewed July 13, 1926.

members somewhat diverging, as shown clearly in Fig. 3. Each clevis or stirrup constitutes a hanger by which a fire brick is suspended in the arch and the hangers will, therefore, be provided in such numbers that the bricks carried by them will be close together and will extend over the entire area of the arch. In Figs. 3 and 6, I have shown a brick which is especially adapted for flat arches and which consists of a body 5 of preferably rectangular form and having all its sides tapering so that only the very small portion, indicated at 6, at the lower end or face of the brick will be in contact with an adjoining brick, the space between the bricks being of inverted pyramidal form flaring toward the tops of the bricks and providing pockets to receive a cushion 7 of a sbesms oeinent which will serve tFdTo-ldthe bricks together and prevent heat rising between the bricks. Each brick is provided at its upper end with a central lug or spur 8 which fits closely between the ends of the hanger and is pro vided wtih a transverse opening through which, and similar openings in the ends of the hanger, a securing bolt 9 may be passed. The brick will be firmly secured in the hanger when the nut 10 on the end of the bolt is turned home, and to avoid cracking of the brick through contact of the same with the metal of the bolt, I provide a cushion sleeve 11 of asbestos or similar material which fills the eye or opening through the lug 8 and completely houses the bolt.

It will be readily noted that the bricks are all supported from above and the support for each brick is independent of the supports for all the other bricks, the asbestos cement placed between the bricks being primarily a heat-resisting medium to prevent the heat passing between the bricks and destroying the arch and being only incidentally a means for connecting the bricks. Adhesive qualities in the asbestos filling should be eliminated as much as possible as the invention contemplates the bricks being supported solely by the hangers and the rods on which the hangers are suspended. The lower ends of the bricks will be in contactthrough a sufficient extent to close the entire roof of the arch, but inasmuch as they taper upwardly and are not in contact, except at their lower ends, any one brick may be easily removed without disturbing any of the other bricks by merely removing the securing bolt 9 after obtaining access thereto from above the arch.

The form of brick shown in Fig. 3 and Fig. 6 is especially adapted for a. flat arch but the bricks may be given any desired form at their lower ends so that they may be made to conform to any desired angle and an arch of any desired outline or dimensions may be formed. In Figs. 4 and 5, I have illustrated a brick composed of two halves having flat faces 12 which abut medially of the brick and which are provided with beveled ends 13 so that, if two bricks be brought together with the beveled surfaces 13 in contact, the bricks will be disposed in angular relation and may accommodate the desire-d angularity or rise of the arch. It will be noted that in the particular form shown in Fig. 4, the beveled surfaces 13 are of different extent and are of different angles to the exposed lower face. of the brick. In Fig. 2 at 14-, I have shown a brick in which the two sides have different angles of obliquity so that the spaces between said brick and the adjacent brick will be of different outlines but in all forms of the bricks the several bricks are separately suspended and are supported from above so that any one brick may be removed, if repairs are needed, without disturbing any other bricks. The suspending of the bricks separately in the manner shown and described accommodates expansion in the arch without affecting the individual bricks, and

the asbestos cement cannot work through between the bricks onto the face of the same, although there is ample space between adjacent bricks to accommodate the expansion of the arch due to the heat of the furnace.

Having thus described the invent-ion, I claim:

1. A furnace arch comprising beams, rods fitted through and extending between the beams, a plurality of inverted stirrups spanning and depending from each rod, bricks secured within and carried by the lower ends of the respective stirrups, each stirrup carrying a. single brick and the bricks being out of contact except immediately adjacent their exposed faces, and a heat-resistant filling composed solely of plastic material between the adjacent bricks.

2. A furnace arch comprising parallel beams, parallel rods extending between the beams, a plurality of hangers suspended on each rod, bricks each provided with a central lug at its upper end fitting within the lower end of a hanger, a securing bolt inserted through said lug and the ends of the hanger, a heat-resistant cushion encircling the bolt within the lug, and a hcat-resistant filler between adjacent bricks.

In testimony whereof I affix my signature.

ANDREW O. JACKSON. [Ls] 

